Year	Number
1960	-90381
1961	-56177
1962	-59833
1963	-66521
1964	-72587
1965	-72486
1966	-96681
1967	-98676
1968	-116362
1969	-130524
1970	-137213
1971	-138534
1972	-140810
1973	-137332
1974	-135138
1975	-113208
1976	-129187
1977	-36258
1978	-55950
1979	-66472
1980	-261285
1981	-475073
1982	-489089
1983	-486358
1984	-547736
1985	-588611
1986	-641663
1987	-618502
1988	-573155
1989	-592054
1990	-286584
1991	-319832
1992	-298907
1993	-316437
1994	-276896
1995	-313979
1996	-320872
1997	-312542
1998	-302976
1999	-335401
2000	-356430
2001	-348349
2002	-324106
2003	-332396
2004	-270797
2005	-318048
2006	-312270
2007	-309663
2008	-321847
2009	-289132
2010	-41156
2011	4184
2012	-48160
2013	-101719
2014	-100413
2015	-82173
2016	33094
2017	-12438
2018	-99430
2019	-47764
2020	-9949
2021	-52649
2022	-51399
2023	-50239